Question

我有两张桌子：

1）BlogPost：

 COLUMN_NAME    DATA_TYPE
Id                  int
Title             varchar
Description       varchar
ImageName         varchar
FileName          varchar
CreatedDate       datetime
Tags              varchar
ModifiedDate      datetime
RateNumber           int
CreatedBy            int
ShortDescription    varchar

2。 BlogRating：

Id  EmployeeId  PostId  Rate
4     1           12    3
5     1           13    2
6     1           11    2

我编写了一个存储过程来保存BlogRating的详细信息：

ALTER PROCEDURE [dbo].[BlogRatingSave]
     @EmployeeId    int
    ,@PostId        int
    ,@Rate          int
AS
BEGIN
    DELETE FROM [HRM_BlogRating]
        WHERE   [HRM_BlogRating].[EmployeeId] = @EmployeeId 
            AND [HRM_BlogRating].[PostId] = @PostId 

    INSERT INTO [HRM_BlogRating]
        ([EmployeeId]
        ,[PostId]
        ,[Rate]
        )
    VALUES
        (@EmployeeId    
        ,@PostId        
        ,@Rate
        )
END

我想要的是，如果不同的员工提供费率，在保存BlogRating的同时我需要自动增加table1by中的字段RateNumber 1.同时，如果下次同一员工费率，则RateNumber不应该增加。请帮我解决这个问题。

Answer 1

为什么要删除然后插入。相反，您应该尝试插入，如果失败（由于重复），则进行更新。

在此过程中，您还可以调整评级的值，但我认为您需要传递进行更改的人员的EmployeeId，因为这是您规则的一部分。即

update BlogPost set RateNumber = RateNumber + 1 where EmployeeId = @EmployeeID and CreatedBy != @EmployeeID

所以它会变成：

ALTER PROCEDURE [dbo].[BlogRatingSave]
     @EmployeeId    int
    ,@PostId        int
    ,@Rate          int
AS
BEGIN
    BEGIN TRY
        INSERT INTO [HRM_BlogRating]
            ([EmployeeId]
            ,[PostId]
            ,[Rate]
            )
        VALUES
            (@EmployeeId    
            ,@PostId        
            ,@Rate
            )
    END TRY
    BEGIN CATCH
        UPDATE [HRM_BlogRating]
             SET Rate = @Rate
        WHERE EmployeeID = @EmployeeID and PostId = @PostId
    END CATCH

    UPDATE BlogPost set RateNumber = RateNumber + 1 where EmployeeId = @EmployeeID and CreatedBy != @EmployeeID
END

Answer 2

我可以试试这个作为解决方案吗？ @迈克尔

ALTER PROCEDURE [dbo].[BlogRatingSave]
     @EmployeeId    int
    ,@PostId        int
    ,@Rate          int
AS
BEGIN
IF(EXISTS(SELECT 1 FROM [HRM_BlogRating] WHERE EmployeeId= @EmployeeId AND [PostId] = @PostId))
    BEGIN
        DELETE 
            FROM 
                [HRM_BlogRating]
        WHERE   
                [HRM_BlogRating].[EmployeeId]=@EmployeeId  
            AND 
                [HRM_BlogRating].[PostId] = @PostId 
    END
ELSE
    BEGIN
        UPDATE 
            HRM_BlogPost 
        SET 
            RateNumber=isnull(RateNumber,0)+1 
        WHERE 
            Id=@PostId
    END 

    INSERT INTO [HRM_BlogRating]
        ([EmployeeId]
        ,[PostId]
        ,[Rate]
        )
    VALUES
        (@EmployeeId    
        ,@PostId        
        ,@Rate
        )
END

RateNumber的自动递增

2 个答案: